CN104485940A - Two-machine hot standby switching circuit - Google Patents
Two-machine hot standby switching circuit Download PDFInfo
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- CN104485940A CN104485940A CN201410668411.8A CN201410668411A CN104485940A CN 104485940 A CN104485940 A CN 104485940A CN 201410668411 A CN201410668411 A CN 201410668411A CN 104485940 A CN104485940 A CN 104485940A
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Abstract
The invention discloses a two-machine hot standby switching circuit. The two-machine hot standby switching circuit comprises an isolating circuit, a switching interlocking circuit and an active/standby indicating circuit, wherein the switching interlocking circuit comprises two relays, each relay comprises three contact switches, one of the three switches is normally closed and the other two of the three switches are normally open. Isolated system A active striving signals are connected to a first end of a coil of a system A relay through the normally closed switch of a system B relay, and a second end of the coil of the system A relay is connected with a system A control power supply; isolated system B active striving signals are connected to a first end of a coil of the system B relay through the normally closed switch of the system A relay, and the second end of the coil of the system B relay is connected with a system B control power supply; system A active/standby indicating signals are output to a system A and a system B and system B active/standby indicating signals are output to the system A and the system B through the normally open switches of the system A and the system relays. The two-machine hot standby switching circuit has the advantages that the circuit is simple, the quantity of the used relays is small and the cost is low; the circuit reliability is high and the isolation of the two systems is realized.
Description
Technical field
The present invention relates to two is hot-backup system, particularly relates to a kind of two-node cluster hot backup commutation circuit.
Background technology
Nowadays, electronic product system development rapidly, all adopting two-node cluster hot backup, three to get two, two in the occasion that some reliability requirements are higher takes advantage of two to get second-class system pattern, improve the reliability of product systems, once system goes wrong, system can recover normal voluntarily, and prompting maintenance personnel keep in repair.Two is that hot-backup system needs to adopt two-node cluster hot backup commutation circuit to realize the switching between principal series and standby system, and existing two-node cluster hot backup commutation circuit all has some following defects and restriction: need multiple relay, and circuit is complicated; Nondeterministic statement is there is during manual operation diverter switch.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of two-node cluster hot backup commutation circuit, and circuit is simple, employing relay is few, cost is low; Circuit reliability is high, realize two is isolation.
For solving the problems of the technologies described above, two-node cluster hot backup commutation circuit provided by the invention, two A system and B system being hot-backup system and comprising Hot Spare each other, two-node cluster hot backup commutation circuit is used for switching the standby machine state of A system and B system, described two-node cluster hot backup commutation circuit comprises: buffer circuit, switch interlock circuit, active and standby indicating circuit.
The standby machine of described A system and described B system composition exports synchronizing signal and robs main signal to described buffer circuit, and described buffer circuit is input in described switching interlock circuit with robbing after main signal is isolated the synchronizing signal that described standby machine exports.
Described switching interlock circuit comprises an A system relay and a B system relay.
Described A system relay comprises three contact switchs makes these three contact switchs be respectively the first switch, second switch and the 3rd switch, described in when the coil of described A system relay is not energized, the first switch is in normally off, and described second switch and described 3rd switch are in normally open.
Described B system relay comprises three contact switchs makes these three contact switchs be respectively the 4th switch, the 5th switch and the 6th switch; Described in when the coil of described B system relay is not energized, the 4th switch is in normally off, and described 5th switch and described 6th switch are in normally open.
Main signal is connected to the coil of described A system relay first end by described 4th switch is robbed by A system after isolation, and the second end of the coil of described A system relay connects A system and controls power supply.
Main signal is connected to the coil of described B system relay first end by described first switch is robbed by B system after isolation, and the second end of the coil of described B system relay connects B system and controls power supply.
Described second switch is connected between the first output of described active and standby indicating circuit and the significant level of A owner for index signal, and the first output of described active and standby indicating circuit exports described A owner for index signal to described A system.
Described 3rd switch is connected between the second output of described active and standby indicating circuit and the significant level of described A owner for index signal, and the second output of described active and standby indicating circuit exports described A owner for index signal to described B system.
Described 5th switch is connected between the 3rd output of described active and standby indicating circuit and the significant level of B owner for index signal, and the 3rd output of described active and standby indicating circuit exports described B owner for index signal to described A system.
Described 6th switch is connected between the 4th output of described active and standby indicating circuit and the significant level of described B owner for index signal, and the 4th output of described active and standby indicating circuit exports B owner for index signal to described B system.
Further improvement is, described switching interlock circuit comprises a manual switchover lock; Described manual switchover lock comprises four nodes and a diverter switch; First node of described manual switchover lock connects the A system synchronizing signal after isolating, second node connects the first end of the coil of described A system relay, 3rd node connects the B system synchronizing signal after isolation, and the 4th node connects the first end of the coil of described B system relay.
Described diverter switch switches between three kinds of states, the first state is the state that described first node is connected with described Section Point, the second state is the state that described 3rd node is connected with described 4th node, and the third state is that four nodes of described manual switchover lock do not connect mutually.
Further improvement is, described A owner is low level for the significant level of index signal, and described B owner is low level for the significant level of index signal.
Further improvement is, the synchronizing signal that the described standby machine after isolation exports is 24V signal with robbing main signal.
Further improvement is, what described standby machine exported robs main signal for realizing the principal series of described standby machine and the standby automatic switchover being.
When described A system rob main signal prior to described B system rob main signal effective time, or when described A system rob effective, the described B system of main signal rob main signal keep invalid time, A system after isolation robs main signal and makes the coil electricity of described A system relay and control power supply with described A system to be connected, described first switch is broken the coil electricity of described A system relay thus B system after making isolation robs main signal and described B system and controls power supply and disconnect, now described A is principal series, and described B is standby system.
When described B system rob main signal prior to described A system rob main signal effective time, or when described B system rob effective, the described A system of main signal rob main signal keep invalid time, B system after isolation robs main signal and makes the coil electricity of described B system relay and control power supply with described B system to be connected, described 4th switch is broken the coil electricity of described B system relay thus A system after making isolation robs main signal and described A system and controls power supply and disconnect, now described B is principal series, and described A is standby system.
Further improvement is, described manual switchover lock realizes the principal series of described standby machine and the manual switchover of standby system according to the synchronizing signal that described standby machine exports.
When the synchronizing signal that described standby machine exports is effective: when described diverter switch is switched to the first state, described A system synchronizing signal after isolation makes the coil electricity of described A system relay and controls power supply with described A system to be connected, described first switch is broken the coil electricity of described A system relay thus B system after making isolation robs main signal and described B system and controls power supply and disconnect, described A is principal series, and described B is standby system; When described diverter switch is switched to the second state, described B system synchronizing signal after isolation makes the coil electricity of described B system relay and controls power supply with described B system to be connected, described 4th switch is broken the coil electricity of described B system relay thus A system after making isolation robs main signal and described A system and controls power supply and disconnect, described B is principal series, and described A is standby system.
When the synchronizing signal that described standby machine exports is invalid, when described diverter switch is switched to the first state, the coil of described A system synchronizing signal to described A system relay after isolation is inoperative, the principal series of described standby machine and standby be that state is constant; When described diverter switch is switched to the second state, the coil of described B system synchronizing signal to described B system relay after isolation is inoperative, the principal series of described standby machine and standby be that state is constant.
Further improvement is, robbing when main signal is high level that described standby machine exports is effective.
Further improvement is, effective when the synchronizing signal that described standby machine exports is high level; When principal series with for when being synchronous, the synchronizing signal of described standby system is effective, and the synchronizing signal of described principal series is defaulted as effective or invalid.
The present invention adopts the normally closed of relay or normal opened contact to disconnect or connects active and standby machine indicating circuit, rob the automatic and manual switchover between main and standby machine by the competition of robbing between main relay, adopt buffer circuit to realize the isolation of standby machine control signal and relay circuit; Switching interlock circuit of the present invention adopts two relays just can realize, and two relays can realize automatically switching and interlocking thus ensure unique principal series; The present invention can export the activestandby state of active and standby system by active and standby indicating circuit, ensured the reliability of signal by the switch control rule of relay; Because the present invention only needs employing two relays just can realize, circuit is very simple, cost is low; The present invention realizes automatically switching by the setting of buffer circuit and active and standby indicating circuit and two relays and interlocking can improve that the reliability of circuit is high and to realize two be isolation.The setting that the present invention manually switches lock can realize manual switching.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the structural representation of the buffer circuit of the embodiment of the present invention;
Fig. 2 is the structural representation of the switching interlock circuit of the embodiment of the present invention;
Fig. 3 is that three kinds of switching state schematic diagrames are locked in the manual switchover of the embodiment of the present invention;
Fig. 4 is the structural representation of the active and standby indicating circuit of the embodiment of the present invention.
Embodiment
As shown in Figure 1, be the structural representation of buffer circuit 101 of the embodiment of the present invention; As shown in Figure 2, be the structural representation of switching interlock circuit 102 of the embodiment of the present invention; As shown in Figure 3, be that 103 3 kinds of switching state schematic diagrames are locked in the manual switchover of the embodiment of the present invention; As shown in Figure 4, be the structural representation of active and standby indicating circuit 104 of the embodiment of the present invention.Embodiment of the present invention two-node cluster hot backup commutation circuit, two A system and B system being hot-backup system and comprising Hot Spare each other, two-node cluster hot backup commutation circuit is used for switching the standby machine state of A system and B system, described two-node cluster hot backup commutation circuit comprises: buffer circuit 101, switch interlock circuit 102, active and standby indicating circuit 104.
The standby machine of described A system and described B system composition exports synchronizing signal and robs main signal to described buffer circuit 101, and described buffer circuit 101 is input in described switching interlock circuit 102 to the synchronizing signal that described standby machine exports with robbing after main signal is isolated; Be preferably, the synchronizing signal that the described standby machine after isolation exports is 24V signal with robbing main signal.As shown in Figure 1, the synchronizing signal that described standby machine exports and rob main signal and respectively have two, each exports after isolating respectively by an isolator 101a; In Fig. 1, each signal is respectively: ASYN_S is A system synchronizing signal, and SYN_A is the synchronizing signal of the 24V after isolation of A system; BSYN_S is B system synchronizing signal, and SYN_B is the synchronizing signal of the 24V after isolation of B system; AQZ_S is that main signal is robbed by A system, AQZ be A system through isolation after 24V rob main signal; BQZ_S is that main signal is robbed by B system, BQZ be B system through isolation after 24V rob main signal.
As shown in Figure 2, described switching interlock circuit 102 comprises an an A system relay AQZJ and B system relay BQZJ.
Described A system relay AQZJ comprises three contact switchs makes these three contact switchs be respectively the first switch AQZJ1, second switch AQZJ2 and the 3rd switch AQZJ3, described in when the coil of described A system relay AQZJ is not energized, the first switch AQZJ1 is in normally off, and described second switch AQZJ2 and described 3rd switch AQZJ3 is in normally open.
Described B system relay BQZJ comprises three contact switchs makes these three contact switchs be respectively the 4th switch BQZJ1, the 5th switch BQZJ2 and the 6th switch BQZJ3; Described in when the coil of described B system relay BQZJ is not energized, the 4th switch BQZJ1 is in normally off, and described 5th switch BQZJ2 and described 6th switch BQZJ3 is in normally open.
Main signal and signal AQZ are connected to the coil of described A system relay AQZJ first end by described 4th switch BQZJ1 is robbed by A system after isolation, and the second end of the coil of described A system relay AQZJ connects A system control power supply 24_GND_A.
Main signal and signal AQZ are connected to the coil of described B system relay BQZJ first end by described first switch AQZJ1 is robbed by B system after isolation, and the second end of the coil of described B system relay BQZJ connects B system control power supply 24_GND_B.
As shown in Figure 4, described second switch AQZJ2 is connected to the first output of described active and standby indicating circuit 104 and A owner between the significant level of index signal and level 3v3_GND_A, and the first output of described active and standby indicating circuit 104 exports described A owner for index signal and signal AZXA to described A system.
Described 3rd switch AQZJ3 is connected to the second output of described active and standby indicating circuit 104 and described A owner between the significant level of index signal and level 3v3_GND_B, and the second output of described active and standby indicating circuit 104 exports the standby instruction of described A owner and signal AZXB to described B system.
Described 5th switch BQZJ2 be connected to the 3rd output of described active and standby indicating circuit 104 and B owner for index signal significant level between i.e. level 3v3_GND_A, the 3rd output of described active and standby indicating circuit 104 exports described B owner for index signal and signal BZXA to described A system.
Described 6th switch BQZJ3 is connected to the 4th output of described active and standby indicating circuit 104 and described B owner between the significant level of index signal and level 3v3_GND_B, and the 4th output of described active and standby indicating circuit 104 exports B owner for index signal and signal BZXB to described B system.
Be preferably, described A owner is low level for the significant level of index signal, and described B owner is low level for the significant level of index signal.As shown in Figure 4, AZXA is that the active and standby index signal of A system sends to A system, and low level represents principal series.AZXB is that the active and standby index signal of A system sends to B system, and low level represents principal series.BZXA is that the active and standby index signal of B system sends to A system, and low level represents principal series.BZXB is that the active and standby index signal of B system sends to B system, and low level represents principal series.
Described switching interlock circuit 102 comprises a manual switchover lock 103; Described manual switchover lock 103 comprises four nodes and a diverter switch; First node 1 of described manual switchover lock 103 connects the A system synchronizing signal after isolating and signal SYN_A, second node 2 connects the first end of the coil of described A system relay AQZJ, 3rd node 3 connects the B system synchronizing signal after isolation and signal SYN_B, and the 4th node 4 connects the first end of the coil of described B system relay BQZJ.
As shown in Figure 3, described diverter switch switches between three kinds of states, the first state is the state that described first node is connected with described Section Point, the second state is the state that described 3rd node is connected with described 4th node, and the third state is that four nodes of described manual switchover lock 103 do not connect mutually.The first state corresponds to manual gear A machine, and this gear A machine is main frame and principal series machine; The second state corresponds to manual gear B machine, and this gear B machine is main frame; The third state is automatic catch, and the main signal of robbing that the main frame of this gear is exported by standby machine determines automatically.
What described standby machine exported robs main signal for realizing the principal series of described standby machine and the standby automatic switchover being.
When described A system rob main signal AQZ_S prior to described B system rob main signal BQZ_S effective time, or when described A system rob effective, the described B system of main signal AQZ_S rob main signal BQZ_S keep invalid time, A system after isolation robs main signal AQZ and makes the coil electricity of described A system relay AQZJ and control power supply 24_GND_A with described A system to be connected, described first switch AQZJ1's coil electricity of described A system relay AQZJ is broken thus B system after making isolation robs main signal BQZ and described B system and controls power supply 24_GND_B and disconnect, now described A is principal series, and described B is standby system.
When described B system rob main signal BQZ_S prior to described A system rob main signal AQZ_S effective time, or when described B system rob effective, the described A system of main signal BQZ_S rob main signal AQZ_S keep invalid time, B system after isolation robs main signal BQZ and makes the coil electricity of described B system relay BQZJ and control power supply 24_GND_B with described B system to be connected, described 4th switch BQZJ1's coil electricity of described B system relay BQZJ is broken thus A system after making isolation robs main signal AQZ and described A system and controls power supply 24_GND_A and disconnect, now described B is principal series, and described A is standby system.
The synchronizing signal that described manual switchover lock 103 exports according to described standby machine and A system synchronizing signal ASYN_S and B system synchronizing signal BSYN_S realize the principal series of described standby machine and the manual switchover of standby system.
When the synchronizing signal that described standby machine exports is effective: when described diverter switch is switched to the first state, described A system synchronizing signal SYN_A after isolation makes the coil electricity of described A system relay AQZJ and controls power supply 24_GND_A with described A system to be connected, described first switch AQZJ1's coil electricity of described A system relay AQZJ is broken thus B system after making isolation robs main signal BQZ and described B system and controls power supply 24_GND_B and disconnect, described A is principal series, and described B is standby system; When described diverter switch is switched to the second state, described B system synchronizing signal SYN_B after isolation makes the coil electricity of described B system relay BQZJ and controls power supply 24_GND_B with described B system to be connected, described 4th switch BQZJ1's coil electricity of described B system relay BQZJ is broken thus A system after making isolation robs main signal AQZ and described A system and controls power supply 24_GND_A and disconnect, described B is principal series, and described A is standby system.
When the synchronizing signal that described standby machine exports is invalid, when described diverter switch is switched to the first state, the coil of described A system synchronizing signal SYN_A to described A system relay AQZJ after isolation is inoperative, the principal series of described standby machine and standby be that state is constant; When described diverter switch is switched to the second state, the coil of described B system synchronizing signal SYN_B to described B system relay BQZJ after isolation is inoperative, the principal series of described standby machine and standby be that state is constant.
In the embodiment of the present invention, robbing when main signal is high level that described standby machine exports is effective.The synchronizing signal that described standby machine exports is effective when being high level; When principal series with for when being synchronous, the synchronizing signal of described standby system is effective, and the synchronizing signal of described principal series is defaulted as effective or invalid.
Below the course of work of the embodiment of the present invention is described as follows:
A, B two ties up in start-up course and carries out robbing main (competition becomes principal series).Any instant, can only have one is principal series.Standby system is synchronous with between principal series system, and principal series acquiescence is synchronous.When standby system is synchronous with principal series, if manual switching or principal series initiatively fall standby, be main for being scalable.
The index signal inlet circuit of principal series does pull-up process, when to receive signal be high to I/O port, is shown to be non-main signal, when to receive signal be low to I/O port, is shown to be main signal.
Here first an agreement is carried out to signal:
System cloud gray model is divided into initialization and primary period two benches.Primary period distinguishes the active and standby operation phase.
Initial phase two is that to rob main signal all effective.
After initialization, principal series robs main signal continuously effective.
After initialization, standby tie up to the prerequisite synchronous with principal series under to rob main signal effective.
Standby system and principal series synchronous time the standby synchronizing signal being effective.Principal series synchronizing signal can be defaulted as effective or invalid.
Where described manual switchover lock 103 is tangentially, and the lock circuit being namely where is connected
Below with several concrete situation, the operating process of this circuit is described:
1, initial phase, two is all do not enter the primary period, and two is rob master: which first becomes 1 to AQZ and BQZ two signal, where is just get master.
Suppose that AQZ becomes 1 early than BQZ, when AQZ to be 1, BQZ be 0 stage, AQZJ connects, and the loop of BQZJ is disconnected, when BQZ becomes 1, can not connect BQZJ.So instruction A is principal series, B is standby system.
When BQZ becomes 1 early than AQZ, principle ditto described in, instruction B is principal series, and A is standby system.
2, system enters the primary period, and in hot standby situation, controller, standby host fault automatically switch.
During normal operating conditions, suppose that A is principal series, B is standby system.B system completes effectively robs main signal BQZ=1 with synchronous also output of A system, and when A system, fault causes AQZ to become 0, and now A system robs main relay AQZJ dead electricity and falls, and B system robs main relay BQZJ and connects.Indicating circuit instruction A is standby system, and B is principal series.Complete active and standby system to automatically switch.
Suppose that B is main, A is standby, principle ditto described in.
3, one is main, and one is standby, and two is when being in asynchronous state, when carrying out manual switchover with described manual switchover lock 103, switches without effect.
Suppose that A is main, B is standby, and two is be in asynchronous state, and because SYN_A, SYN_B disconnect, any lateral circuit can not be made to change so be locked into capable handover operation, it is invalid to switch.When B is main, A is standby, two be when being in asynchronous state too, switching is invalid.
4, one is main, and one is standby, and two is when being in synchronous regime, when carrying out manual switchover with described manual switchover lock 103, tangentially which, which is just principal series.
Suppose that A is main, B is standby, and two is be in synchronous regime, and SYN_A, SYN_B are 1, and when described manual switchover lock 103 tangential A sides, namely the lock circuit of A side is connected, AQZJ continues to keep on-state, and A system remains master.When the tangential B side of lock, namely the lock circuit of B side is connected, BQZJ connects, and the circuit of AQZJ is disconnected, and instruction B is main, and A is standby, completes handover operation.
Suppose that B is main, A is standby, and two is when being in synchronous regime, principle ditto described in.When locking tangential A, completing handover operation, when locking tangential B, keeping main and standby relation.
5, when only have one be exist time, existence be principal series.The switching of described manual switchover lock 103 is inoperative.
Suppose that A system exists, B system does not exist or power-off.All signals of B side are all disconnect, and when A robs master, A is principal series.Even if when described manual switchover lock 103 tangential B, B lateral circuits are also disconnect, A can not be made to reduce to standby.Suppose that B system exists, A system do not exist or power-off time the same, B is main.
Above by specific embodiment to invention has been detailed description, but these are not construed as limiting the invention.Without departing from the principles of the present invention, those skilled in the art also can make many distortion and improvement, and these also should be considered as protection scope of the present invention.
Claims (8)
1. a two-node cluster hot backup commutation circuit, two A system and B system being hot-backup system and comprising Hot Spare each other, two-node cluster hot backup commutation circuit is used for switching the standby machine state of A system and B system, it is characterized in that, described two-node cluster hot backup commutation circuit comprises: buffer circuit, switch interlock circuit, active and standby indicating circuit;
The standby machine of described A system and described B system composition exports synchronizing signal and robs main signal to described buffer circuit, and described buffer circuit is input in described switching interlock circuit to the synchronizing signal that described standby machine exports with robbing after main signal is isolated;
Described switching interlock circuit comprises an A system relay and a B system relay;
Described A system relay comprises three contact switchs makes these three contact switchs be respectively the first switch, second switch and the 3rd switch, described in when the coil of described A system relay is not energized, the first switch is in normally off, and described second switch and described 3rd switch are in normally open;
Described B system relay comprises three contact switchs makes these three contact switchs be respectively the 4th switch, the 5th switch and the 6th switch; Described in when the coil of described B system relay is not energized, the 4th switch is in normally off, and described 5th switch and described 6th switch are in normally open;
Main signal is connected to the coil of described A system relay first end by described 4th switch is robbed by A system after isolation, and the second end of the coil of described A system relay connects A system and controls power supply;
Main signal is connected to the coil of described B system relay first end by described first switch is robbed by B system after isolation, and the second end of the coil of described B system relay connects B system and controls power supply;
Described second switch is connected between the first output of described active and standby indicating circuit and the significant level of A owner for index signal, and the first output of described active and standby indicating circuit exports described A owner for index signal to described A system;
Described 3rd switch is connected between the second output of described active and standby indicating circuit and the significant level of described A owner for index signal, and the second output of described active and standby indicating circuit exports described A owner for index signal to described B system;
Described 5th switch is connected between the 3rd output of described active and standby indicating circuit and the significant level of B owner for index signal, and the 3rd output of described active and standby indicating circuit exports described B owner for index signal to described A system;
Described 6th switch is connected between the 4th output of described active and standby indicating circuit and the significant level of described B owner for index signal, and the 4th output of described active and standby indicating circuit exports B owner for index signal to described B system.
2. two-node cluster hot backup commutation circuit as claimed in claim 1, is characterized in that: described switching interlock circuit comprises a manual switchover lock; Described manual switchover lock comprises four nodes and a diverter switch; First node of described manual switchover lock connects the A system synchronizing signal after isolating, second node connects the first end of the coil of described A system relay, 3rd node connects the B system synchronizing signal after isolation, and the 4th node connects the first end of the coil of described B system relay;
Described diverter switch switches between three kinds of states, the first state is the state that described first node is connected with described Section Point, the second state is the state that described 3rd node is connected with described 4th node, and the third state is that four nodes of described manual switchover lock do not connect mutually.
3. two-node cluster hot backup commutation circuit as claimed in claim 1, it is characterized in that: described A owner is low level for the significant level of index signal, described B owner is low level for the significant level of index signal.
4. two-node cluster hot backup commutation circuit as claimed in claim 1, is characterized in that: the synchronizing signal that the described standby machine after isolation exports is 24V signal with robbing main signal.
5. two-node cluster hot backup commutation circuit as claimed in claim 1, is characterized in that: what described standby machine exported robs main signal for realizing the principal series of described standby machine and the standby automatic switchover being;
When described A system rob main signal prior to described B system rob main signal effective time, or when described A system rob effective, the described B system of main signal rob main signal keep invalid time, A system after isolation robs main signal and makes the coil electricity of described A system relay and control power supply with described A system to be connected, described first switch is broken the coil electricity of described A system relay thus B system after making isolation robs main signal and described B system and controls power supply and disconnect, now described A is principal series, and described B is standby system;
When described B system rob main signal prior to described A system rob main signal effective time, or when described B system rob effective, the described A system of main signal rob main signal keep invalid time, B system after isolation robs main signal and makes the coil electricity of described B system relay and control power supply with described B system to be connected, described 4th switch is broken the coil electricity of described B system relay thus A system after making isolation robs main signal and described A system and controls power supply and disconnect, now described B is principal series, and described A is standby system.
6. two-node cluster hot backup commutation circuit as claimed in claim 2, is characterized in that: described manual switchover lock realizes the principal series of described standby machine and the manual switchover of standby system according to the synchronizing signal that described standby machine exports;
When the synchronizing signal that described standby machine exports is effective: when described diverter switch is switched to the first state, described A system synchronizing signal after isolation makes the coil electricity of described A system relay and controls power supply with described A system to be connected, described first switch is broken the coil electricity of described A system relay thus B system after making isolation robs main signal and described B system and controls power supply and disconnect, described A is principal series, and described B is standby system; When described diverter switch is switched to the second state, described B system synchronizing signal after isolation makes the coil electricity of described B system relay and controls power supply with described B system to be connected, described 4th switch is broken the coil electricity of described B system relay thus A system after making isolation robs main signal and described A system and controls power supply and disconnect, described B is principal series, and described A is standby system;
When the synchronizing signal that described standby machine exports is invalid, when described diverter switch is switched to the first state, the coil of described A system synchronizing signal to described A system relay after isolation is inoperative, the principal series of described standby machine and standby be that state is constant; When described diverter switch is switched to the second state, the coil of described B system synchronizing signal to described B system relay after isolation is inoperative, the principal series of described standby machine and standby be that state is constant.
7. the two-node cluster hot backup commutation circuit as described in claim 1 or 5, is characterized in that: robbing when main signal is high level that described standby machine exports is effective.
8. the two-node cluster hot backup commutation circuit as described in claim 1 or 2 or 6, is characterized in that: effective when the synchronizing signal that described standby machine exports is high level; When principal series with for when being synchronous, the synchronizing signal of described standby system is effective, and the synchronizing signal of described principal series is defaulted as effective or invalid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN108009056A (en) * | 2017-12-28 | 2018-05-08 | 合肥工大高科信息科技股份有限公司 | A kind of safety computer platform two-node cluster hot backup switching and fault detection system and method |
| CN108459496A (en) * | 2018-05-17 | 2018-08-28 | 兰州大成铁路信号有限公司 | Safety Redundancy system for railway signal system |
| CN109515481A (en) * | 2018-10-25 | 2019-03-26 | 交控科技股份有限公司 | A kind of circuit, the train of the not parking auto-changeover control power of ATP and LKJ |
| CN110716421A (en) * | 2018-07-11 | 2020-01-21 | 兰州大成铁路信号有限公司 | Execution unit switching circuit, electronic execution system comprising same and switching method |
| CN112650047A (en) * | 2020-12-04 | 2021-04-13 | 北京交大微联科技有限公司 | Relay inverter control circuit, control method and computer interlocking system |
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